In a medium bowl, sift together gluten free flour, guar gum, salt and sugar. Add cold shredded butter and shortening cubes. Using a pastry blender, cut through the dough until small clumps form about the size of a pea or smaller. Alternatively, you can use your hands to do this if you do not have a pastry blender. Add ¼ teaspoon apple cider vinegar.

Add 3 Tbs ice cold water and use pastry blender until the water is incorporated. Add 1 TBS ice cold water, and this time use your hands to turn over the dough. If all of your flour has not stuck to a ball, add another 1 Tbs ice cold water. Continue rolling the dough into a ball until all the flour mixture is combined and the ball is nice and smooth. Be careful not to add too much water as this will make the dough very tacky and too sticky.

Shape the dough into a disc (approx. 6 inches in diameter) and place the dough on a piece of parchment paper or wax or cling wrap. Cover the top of the dough with another piece of parchment, wax or cling wrap. Note: I like to use parchment on the bottom because it is wider than standard cling wrap. I then use cling wrap on the top so I can easily see the dough, gently lifting the cling wrap as needed to cover the dough as I'm rolling.

Using a rolling pin, begin gently pressing and rolling from the center of the dough out to the edge. Each time you press and roll, slightly rotate the crust (think of a clock and rolling out every 5 minute increments). Continue this until your dough is approximately 11-12 inches in diameter and you have a nice, even layer of pie dough. Carefully remove the cling wrap.

Use the bottom parchment sheet to help you gently turn your pie dough into your 9 inch pie plate. Gently press the dough down into the plate and crimp the edges as desired. If you have any tears in the dough, simply press the dough and it will go back together. Cut off any excess pie dough hanging over the edge. Loosely cover the pie dough with plastic wrap and freeze for 30 minutes or refrigerate for 1 hour.

Remove from refrigerator and fill your pie dough with desired ingredients and bake according to whatever your recipe states.